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Paging With DropDownList in ASP.NET

Posted by Satyapriya Nayak Articles | ASP.NET Programming February 29, 2012
In this article we will learn about Paging with a DropDownList in ASP.NET.
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In this article we will  learn about Paging with a DropDownList in ASP.NET. Here runtime numbers will be shown in the DropDownList; when we choose a number, that number of records will be shown in the GridView. Here paging facilities are also provided to the GridView.

Table Creation

paging.jpg

Default.aspx code

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Paging_with_dropdownlist._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<
body>
    <form id="form1" runat="server">
    <div>
    <asp:GridView id="g1" Runat="Server"
        AllowPaging="True"
        AutoGenerateColumns="true" onpageindexchanging="g1_PageIndexChanging" PagerStyle-Visible = "False" HeaderStyle-BackColor="Red"
     HeaderStyle-ForeColor="White" BackColor="#FFCC66">
<HeaderStyle BackColor="Red" ForeColor="White"></HeaderStyle>
        <AlternatingRowStyle BackColor="#FFFFCC" />
</asp:GridView>
        <asp:Label ID="Label1" runat="server" Text="Choose No." Font-Bold="True"
            ForeColor="#CC3300"></asp:Label>
        <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true"  onselectedindexchanged="DropDownList1_SelectedIndexChanged">
        <asp:ListItem Text="5" Value="5"></asp:ListItem>
        <asp:ListItem Text="10" Value="10"></asp:ListItem>
        <asp:ListItem Text="15" Value="15"></asp:ListItem>
        <asp:ListItem Text="20" Value="20"></asp:ListItem>
        </asp:DropDownList>
    </div>
    </form>
</body>
</
html>

Default.aspx.cs code

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
namespace Paging_with_dropdownlist
{
    public partial class _Default : System.Web.UI.Page
    {
        string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
        SqlCommand com;
        SqlDataAdapter sqlda;
        DataSet ds;
        string str;
        int size = 0;
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                DropDownList1.Items.Insert(0, ("Select"));
            }
        }
        void bindgrid()
        {
            SqlConnection con = new SqlConnection(connStr);
            con.Open();
            str = "select * from employee";
            com = new SqlCommand(str, con);
            sqlda = new SqlDataAdapter(com);
            ds = new DataSet();
            sqlda.Fill(ds, "employee");
            g1.DataMember = "employee";
            g1.DataSource = ds;
            g1.DataBind();
            con.Close();
        }
        protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
         {
            if (DropDownList1.SelectedItem.Text != "0")
            {
                size = int.Parse(DropDownList1.SelectedItem.Value.ToString());
                g1.PageSize = size;
                bindgrid();
            }
        }
        protected void g1_PageIndexChanging(object sender, GridViewPageEventArgs e)
        {
            g1.PageIndex = e.NewPageIndex;
            bindgrid();
        }
    }
}

Output

paging1.jpg

paging2.jpg

paging3.jpg

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